[(2R,3S,5R)-5-(2,4-dioxopyrimidin-1-yl)-3-hydroxyoxolan-2-yl]methyl phosphate
[(2R,3S,5R)-5-(2,4-dioxopyrimidin-1-yl)-3-hydroxy-tetrahydrofuran-2-yl]methyl phosphate
[(2R,3S,5R)-5-(2,4-dioxo-1-pyrimidinyl)-3-hydroxy-2-tetrahydrofuranyl]methyl phosphate
[(2R,3S,5R)-5-(2,4-diketopyrimidin-1-yl)-3-hydroxy-tetrahydrofuran-2-yl]methyl phosphate
[(2R,3S,5R)-5-(2,4-dioxopyrimidin-1-yl)-3-hydroxy-oxolan-2-yl]methyl phosphate